1

In some versions of FORTRAN, an identifier consists of a string of one to six alphanumeric characters beginning with a letter. (An alphanumeric character is one of ...

Question

In some versions of FORTRAN, an identifier consists of a string of one to six alphanumeric characters beginning with a letter. (An alphanumeric character is one of A to $\mathrm{Z}$ or 0 to 9.) How many valid FORTRAN identifiers are there?

In some versions of FORTRAN, an identifier consists of a string of one to six alphanumeric characters beginning with a letter. (An alphanumeric character is one of A to $\mathrm{Z}$ or 0 to 9.) How many valid FORTRAN identifiers are there?



Answers

In
a
certain
state,
each automobile
license
plate
number
consists
of
two
letters followed
by
a
four-digit
number.
To
avoid
confusion between
O
and
zero
and
between
I
and
one,
the letters
O
and
I
are
not
used.
How
many
distinct license
plate
numbers
can
be
formed
in
this
state?


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